Here are my kits. I have a metal detector on the left and a radio kits on the right. The metal detector would change the frequency of the radio when it locates a metal. I placed the metal detector between the newspaper and the trash can and I placed the radio inside the newspaper.
Noise can be heard from the newspaper holder. When open the noise is even louder. If the person has some sort of metal material on them that is near the metal detector the radio frequency will be effected.
Here are movie clips of what I did.
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